Apache Tomcat version older than 7.0.30

Important: Bypass of security constraints CVE-2012-3546
When using FORM authentication it was possible to bypass the security constraint checks in the FORM authenticator by appending /j_security_check to the end of the URL if some other component (such as the Single-Sign-On valve) had called request.setUserPrincipal() before the call to FormAuthenticator#authenticate(). This was fixed in revision 1377892.

DIGEST authentication weakness CVE-2012-3439
Three weaknesses in Tomcat's implementation of DIGEST authentication were identified and resolved:
Tomcat tracked client rather than server nonces and nonce count.
When a session ID was present, authentication was bypassed.
The user name and password were not checked before when indicating that a nonce was stale.
These issues reduced the security of DIGEST authentication making replay attacks possible in some circumstances.